Ok I have noticed this a few times at night that when Im driving with the AC on my door windows and windshield fog up. Not normal fog on the inside but condensation on the outside.

Is this normal? I don't know why but it seems unusual to me. Especially the side windows and it makes it impossible to see out of. At first I thought it was doing it in the front windshield because it has the defogger, but even when that isn't selected it gets moisture on the outside in the same exact spot and I have to use my wipers to get rid of this. Is this only me?

 

it's probably just the humidity in your area at the moment.

 

It's like a beer can...cold on the inside hot on the outside..so it sweats. HE HE

 

Alrite thanks.

 

so those wanting to know a more scienctific answer, your ac causes the temp of the glass to go below the dew point of the air outside, hence, the water in the air condensates, and forms on the outside of the glass. the reverse happens when the inside fogs. you saturate the water in the air with your breathing, and that causes water to form on the inside. hope that also explains why scion made the windshield defogger automatically take air in from outside when you hit the button.

 

thermal dynamics... same erason the the roofs were breaking for "unexplained" reasons...

NOTE THE ACTUAL CHANCE OF YOUR ROOF BREAKING ARE SLIM. SO PLEASE DONT SPAM ASKING WHAT WOULD HAPPEN. if it happens take it to your dealer.